The present invention relates to a windscreen wiper device of the “flat blade type” comprising an elastic, elongated carrier element, as well as an elongated wiper blade of a flexible material, which can be placed in abutment with a windscreen to be wiped, which wiper blade includes at least one longitudinal groove, in which groove a longitudinal strip of the carrier element is disposed, which windscreen wiper device comprises a connecting device for a oscillating arm comprising two longitudinal arm sections connected to each other by means of a curved intermediate section, wherein said oscillating arm can be pivotally connected to said connecting device about a pivot axis.
A windscreen wiper device of the “flat blade type” is generally known. In such a windscreen wiper device of the “flat blade type” no use is made of several yokes pivotally connected to each other, but wherein the wiper blade is biased by the carrier element, as a result of which it exhibits a specific curvature. In practice, due to high forces exerted on the connection between the connecting device and the oscillating arm, the reliability of said connection appears to diminish in time. Therefore, there is a need to improve said connection on the one hand, but to ensure an easy disconnection on the other hand, particularly in case of repair or replacement of said wiper blade.
The object of the invention is to provide an improved windscreen wiper device of the “flat blade type”, wherein no use is made of several yokes pivotally connected to each other, but wherein the wiper blade is biased by the carrier element, as a result of which it exhibits a specific curvature.
In order to accomplish that objective, a windscreen wiper device of the type referred to in the introduction is characterized according to the invention in that said connecting device comprises a first part and a second part having an at least substantially U-shaped cross-section with a base and resilient legs, wherein said second part is pivotally connected to said first part about said pivot axis between a first position, wherein said legs of said U-shaped cross-section are blocked by said first part to bend laterally outwardly in order to retain said second part onto said oscillating arm, and a second position, wherein said legs of said U-shaped cross-section are allowed to bend laterally outwardly in order to release said second part from said oscillating arm. In other words, in the first position being the wiping position, wherein the wiper blade is able to carry out its oscillatory movement on a windscreen to be wiped, the oscillating arm and a unit consisting of the connecting device and the wiper blade, are firmly interconnected, wherein the legs of the U-shaped cross-section of the second part are prevented by said first part to bend laterally outwardly. Hence, in this wiping position these legs of the U-shaped cross-section are not allowed, i.e. prevented, to plastically or elastically deform. However, in the second position being the service position, wherein the oscillating arm is in an upright position relative to a windscreen to be wiped, the unit consisting of the connecting device and the wiper blade can easily disconnected for repair of replacement. Hence, in this service position these legs of the U-shaped cross-section are allowed to plastically or elastically deform in a lateral and outward direction. The base and the legs of the U-shaped cross-section of the second part of the connecting device are arranged to accommodate the oscillating arm. In use one of the longitudinal arm sections thereof is positioned on top of the base and between the legs of the U-shaped cross-section, preferably in a form closing manner. The other of the longitudinal arm sections of the oscillating arm in use is also positioned between the legs of the U-shaped cross-section. In use the curved intermediate section of the oscillating arm interconnecting both longitudinal arms sections thereof is guided around the base of the U-shaped cross-section of the second part of the connecting device.
It is noted that the present invention is not restricted to cars, but also refers to rail coaches and other (fast) vehicles.
It is noted that the present invention is not restricted to the use of only one longitudinal strip forming the elastic carrier element that is particularly located in a central longitudinal groove of the wiper blade. Instead, said carrier element may also comprise two longitudinal strips, wherein said strips are disposed in opposite longitudinal grooves of the wiper blade. Said groove (s) may be closed at one outer end.
Further, it is noted that in the invention use is made of a mounting head fixed for rotation to a shaft, wherein said shaft is rotatable alternately in a clockwise and in a counter-clockwise sense carrying said mounting head into rotation. Thus, in turn said mounting head draws said connecting device into rotation and thereby moves said wiper blade. In the alternative, said mounting head is fixed for translation to a carriage, wherein said carriage can be translated alternately in a one linear direction and in another counter linear direction carrying said mounting head into translation. The present invention can therefore be used for circular or linear movement of said mounting head.
In the framework of the present invention the following is noted. Said connecting device, also called “connector”, is preferably made of plastic. The wiper blade being preferably made of an elastomer material, such as rubber, is particularly made through extrusion. Particularly, said wiper blade comprises a spoiler at a side thereof facing away from the windscreen to be wiped, wherein said wiper blade and said spoiler are preferably made in one piece. Said longitudinal groove is preferably a central longitudinal groove accommodating said longitudinal strip. Said longitudinal strip is also called a “flexor”. Said first part of said connecting device is preferably fixedly connected to the longitudinal strip(s) particularly through a welding, brazing (“soldering”), gluing or clamping operation or with the help of a pin inserted through said connecting device and said longitudinal strip(s). In the alternative or in addition thereto, said first part of said connecting device is clamped onto the flexible material of the wiper blade, particularly in case the latter is equipped with a central longitudinal groove for the carrier element.
Said second part acts as a joint part interposed between said first part and said oscillating arm. All the above preferred features of the present invention can be used alone or in combination with any other feature(s), as a skilled person would appreciate.
Said first and second parts are preferably detachably interconnected by snapping, that is clipping said second part onto said first part.
Preferably, said second part is positioned inside said first part at the location of their interconnection. More preferably, said second part is entirely received inside said first part. In a preferred embodiment said second part comprises two protuberances extending outwardly on either side of said second part, wherein said protuberances pivotally engage into correspondingly shaped recesses of said first part. Said protuberances are preferably cylindrical in shape.
In one preferred embodiment of a windscreen wiper device in accordance with the invention in said first position said legs of said U-shaped cross-section face respective side walls of said first part, wherein said side walls of said first part block a lateral outward bending of said legs of said U-shaped cross section in order to retain said second part onto said oscillating arm. Particularly, said legs of said U-shaped cross-section each comprise a laterally inwardly extending protrusion to block a longitudinal movement of a unit consisting of said first part, said second part and said wiper blade away from oscillating arm in said first position.
In another preferred embodiment of a windscreen wiper device according to the invention in said first position said base of said U-shaped cross-section encloses an acute angle with the wiper blade. Particularly, in said first position a front part of said second part is facing towards a windscreen to be wiped. Said front part forms a nose of said second part and in use is facing away from a mounting head drawing the connecting device into rotation and thereby moving the wiper blade.
In another preferred embodiment of a windscreen wiper device in accordance with the invention in said second position said base of said U-shaped cross-section encloses an acute angle with the wiper blade.
Particularly, in said second position said front part of said second part is facing away from a windscreen to be wiped.
The invention will now be explained in more detail with reference to figures illustrated in a drawing, wherein:
The windscreen wiper device is furthermore built up of the connecting device 1 of plastic material for a hook-shaped oscillating arm 2. Alternatively, the connecting device 1 may also be made of metal, such as steel or aluminum. With reference to
Possibly, a spoiler is furthermore present being made in one piece with said wiper blade 2.
The invention is not restricted to the variants shown in the drawing, but it also extends to other embodiments that fall within the scope of the appended claims.
Filing Document | Filing Date | Country | Kind |
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PCT/EP2017/062918 | 5/29/2017 | WO | 00 |